Hammer drill



FIG. 1 is a perspective view of a hammer drill showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

In the above drawings, the broken lines and the areas within the broken lines form no part of the claimed design. 

CLAIM The ornamental design for a hammer drill, as shown and described. 